<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
       <div>
            <img src="../assets/heima.png" alt="">
            <span>言哥的后台管理系统</span>
       </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
      <el-menu background-color="#333744" text-color="#fff"
      active-text-color="#409eff" unique-opened :collapse="isCollapse" :collapse-transition="false"
      router :default-active="activePsth">
        <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单的文本区 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
         
        <!-- 二级菜单 -->
          <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id"
           @click="saveNavState('/' + subItem.path)">
            <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
          </el-menu-item>
  
      </el-submenu>
       
    </el-menu>
      </el-aside>
      <!-- 右侧主体区域 -->
      <el-main>
        <!-- 路由占位符 -->
         <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>


<script>
export default {
  data () {
    return {
      //左侧菜单数据
      menulist:[],
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      //是否折叠
      isCollapse: false,
      //被激活的链接地址
      activePsth:''
    }
  },
  created() {
    this.getMenuList()
    this.activePsth = window.sessionStorage.getItem('activePsth')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
   async getMenuList() {
    const {data: res} = await this.$http.get('menus');
    if(res.meta.status !==200) return this.$message.error(res.meta.msg);
    this.menulist = res.data
    // console.log(res);
    
    },
    //点击切换菜单折叠展开
    toggleCollapse () {
        this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePsth) { 
      window.sessionStorage.setItem('activePsth',activePsth)
      this.activePsth = activePsth
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;

}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>